Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam phong de snippets" » "hai phong de snippets", "van phong de snippets", "nam trong de snippets", "nam phuong de snippets", "nam phong le snippets", "nam khong de snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("nam phong de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nam phong de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam phong de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam phong de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.